Hello all,

I have problem with mikrotik routerboard 450G. Before few days age our RB 450G rebooted automatically every 10 minutes.
Log: router was rebooted without proper shutdown
How to solve this problem.

Very hard to say... If there is no logic reason related to configuration, I would try anohter power supply.
I have seen defective power supplies causing routers to reboot or freeze before. No harm in trying.

There could be a kernel panic. I would connect to the mikrotik from another computer over serial and set the program used for serial connectivity to store logged text. This will ensure any extra data is capturef to help diagnose. Long ago I had to do this to diagnose an issue